The most common and most likely answer to this crossword clue is the 9 letter word TREEHOUSE
I've seen this crossword clue in The Daily Telegraph
T
R
E
E
H
O
U
S
E
Buddy explains!
The straight part
We know that "superior accommodation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case superior accommodation = treehouse.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TREEHOUSE mean?
TREEHOUSE noun- A house, or similar structure within a tree, or several trees, built with light materials; wood, bamboo or aluminum are preferred construction materials.